Effect of freeze drying on in vitro ruminal fermentation dynamics of three tropical shrub legumes with and without condensed tannins

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dc.creatorTiemann, Tassilo T.
dc.creatorÁvila Vargas, P.
dc.creatorLascano Aguilar, Carlos Eduardo
dc.creatorKreuzer, M.
dc.creatorHess, H.D.
dc.date2009
dc.date2014-09-24T08:41:38Z
dc.date2014-09-24T08:41:38Z
dc.date.accessioned2026-06-27T14:31:29Z
dc.descriptionExtensive comparisons of the effects of tropical shrub legumes rich in condensed tannins (CT) require well-conserved material. It is, however, unclear if the application of even gentle methods like freeze drying (lyophilization) affects the results in comparison to fresh material. Therefore, an experiment with the gas-pressure transducer technique, simulating ruminal fermentation dynamics in vitro, was conducted to investigate the effect of freeze drying on the ruminal nutrient degradability of three tropical multipurpose shrub legumes. Leaves of the CT shrubs Calliandra calothyrsus and Flemingia macrophylla and of the CT-free shrub Cratylia argentea were tested either in fresh form or lyophilized. In order to simulate practical feeding conditions, the legume leaves were incubated together with Brachiaria humidicola (1:2) for 144 h. Additionally, incubations were carried out either with or without polyethylene glycol (PEG) to be able to separate effects either dependent or independent of the CT. Only few differences were found between fresh and lyophilized leaves. These included that the proportion of apparently undegraded nitrogenous compounds was higher in fresh than in lyophilized leaves of Flemingia macrophylla, and freeze drying had a limited influence on volatile fatty acid production in Calliandra calothyrsus. The variables related to degradation dynamics (i.e., total gas production, the time until the point of inflection, apparent dry matter degradability), however, were not influenced. There was also no difference between CT and non-CT plants in that respect, as is also obvious from the lack of interactions of state of the plant material and PEG addition. This indicates that effects of freeze drying of shrub leaves on overall ruminal nutrient degradation in mixed grass-legume diets were minor.
dc.identifierhttps://hdl.handle.net/10568/43107
dc.identifier.urihttp://hdl.handle.net/123456789/80690
dc.languageen
dc.rightsOpen Access
dc.sourceTiemann T T, Avila P, Lascano C E, Kreuzer M and Hess H D 2009: Effect of freeze drying on in vitro ruminal fermentation dynamics of three tropical shrub legumes with and without condensed tannins. Livestock Research for Rural Development. Volume 21, Article #226. Retrieved May 20, 2014, from http://www.lrrd.org/lrrd21/12/tiem21226.htm
dc.subjectfeed crops
dc.subjectcalliandra calothyrsus
dc.subjectflemingia macrophylla
dc.subjectcratylia
dc.subjectbrachiaria humidicola
dc.subjectrumen digestion
dc.subjecttannins
dc.subjectdigestión ruminal
dc.subjecttaninos
dc.titleEffect of freeze drying on in vitro ruminal fermentation dynamics of three tropical shrub legumes with and without condensed tannins
dc.typeJournal Article

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